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Plants: Roots, Stems, Leaves. Students will be able to describe the aspects of roots, stems, and leaves and their impact on our daily lives. Plants. Plants and Animals interact on a daily basis. Plants are used by animals for food.

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plants roots stems leaves

Plants: Roots, Stems, Leaves

Students will be able to describe the aspects of roots, stems, and leaves and their impact on our daily lives.

  • Plants and Animals interact on a daily basis.
  • Plants are used by animals for food.
  • Plants are used to make the oxygen necessary for animals to breathe.
  • Plants are different from animals, however their cells do contain a nucleus.
plants the root
Plants: The Root
  • The root is a very important part of the plant and it has the following functions:
  • To help grip the plant to the soil.
  • To absorb water and minerals from the soil.
  • To store food.
  • To propagate or make new plants.
plants the roots
Plants: The Roots
  • The typical root has four parts:
  • Primary root- Grows downward and is the thickest.
  • Secondary root- Connected to the primary root, they are smaller and grow to the side.
  • Root cap- Protects the root and allows it to “drill” through the soil.
plants the roots5
Plants: The Roots

4) Root hairs- absorb water and nutrients from the soil.

  • Some of the food we eat are plant roots-
    • Potatoes
    • Carrots
    • Onions
    • Beets
plants the stem
Plants: The Stem
  • The stem has two primary functions:
  • Maintain the flowers and leaves at a certain distance from the soil.
  • Carry the nutrients and water.
plants the stem7
Plants: The Stem
  • The stem has several different parts:
  • Main stem- The most important stem, it is the stem that is most easily identified (trunk of a tree).
  • Secondary stem- Smalls stems that grow from the main stem (tree branches).
  • Nodes- Bulges in the stems were leaves grow.
plants the stem8
Plants: The Stem
  • Internodes- Spaces between the nodes.
  • We do eat plant stems:
    • Celery
    • Asparagus
    • Sugar Cane
plants the buds
Plants: The Buds
  • Buds are responsible for plant growth. Buds can either be new stems, leaves, or flowers.
  • Buds are three parts:
  • Main terminal bud- The bud in charge of the upward growth of the plant.
  • Secondary terminal buds- Come from secondary stems, they make the secondary stems grow.
plants the buds10
Plants: The Buds

3) Lateral buds- Are on the stem nodes, leaves and flowers grown from them.

  • We do eat buds from plants-
    • Artichokes
    • Cabbage
plants the leaves
Plants: The Leaves
  • The leaves are probably the most important aspect of the plant, because they are in charge of photosynthesis.
  • There are many different sizes and shapes of leaves but leaves tend to have the same parts.
plants the leaves12
Plants: The Leaves

1) The Blade- The expanded part of the leaf. When people think of a leaf or draw a leaf it is usually the blade.

  • Veins- Wrinkles or pipes in the leaves, the central vein is called the midrib.

2) The Petiole- Connects the stem to the blade. Not every leaf has a petiole and are called stalkless.

plants the seeds
Plants: The Seeds
  • Seeds are necessary for some plants to reproduce.
  • Each seed has several parts:
  • Embryo- the little plant
  • Endosperm- food supply in the seed
  • Seed Coat- outer layer of the seed
  • Gymnosperms (“naked seed”)- cone bearing plants are gymnosperms.
  • Pinophyta - Conifers
  • Ginkgophyta - Ginkgo
  • Cycadophyta - Cycads
  • Gnetophyta - Gnetum, Ephedra, Welwitschia
  • Plants that produce flowers or fruits are called angiosperms (“flowering plants”).
  • Most species on the planet are angiosperms.
plants the seeds16
Plants: The Seeds
  • We do eat the seeds or fruits of plants-
    • Apples
    • Oranges
    • Beans
    • Grains
    • Nuts
    • Spices